Table 4.

Performance on the validation set, including turns (n = 7015 strides). Shown are mean values (standard deviation), limits of agreement, RMSE, correlation and equivalence interval (p-value). ^† All correlations were based on Spearman and have $p<0.01$. ^‡ Equivalence tests were based on Wilcoxon signed-rank test.

Metric	IMU	VICON	Rel. Error	Abs. Error	Lim. Agr.	RMSE	Corr. †	Equival. ‡
Stride dur. (s)	$1.22\left(0.23\right)$	$1.23\left(0.24\right)$	$0.00\left(0.05\right)$	$0.02\left(0.05\right)$	$[-0.11,0.11]$	$0.05$	$0.99$	$\pm 0.06\left(0.0\right)$
Swing dur. (s)	$0.41\left(0.08\right)$	$0.41\left(0.06\right)$	$0.01\left(0.05\right)$	$0.03\left(0.04\right)$	$[-0.08,0.09]$	$0.05$	$0.87$	$\pm 0.02\left(0.0\right)$
Stance dur. (s)	$0.81\left(0.18\right)$	$0.82\left(0.19\right)$	$-0.01\left(0.05\right)$	$0.03\left(0.05\right)$	$[-0.11,0.10]$	$0.05$	$0.98$	$\pm 0.04\left(0.0\right)$
Cad. (st/min)	$101.2\left(17.5\right)$	$101.1\left(17.4\right)$	$0.1\left(3.1\right)$	$1.8\left(2.5\right)$	$[-6.0,6.1]$	$3.1$	$0.99$	$\pm 5.05\left(0.0\right)$
SL (cm)	$120.8\left(25.1\right)$	$124.2\left(26.5\right)$	$-3.5\left(9.7\right)$	$6.4\left(8.0\right)$	$[-22.5,15.6]$	$10.3$	$0.94$	$\pm 6.21\left(0.0\right)$
Speed (cm/s)	$103.6\left(33.9\right)$	$106.7\left(36.3\right)$	$-3.1\left(9.2\right)$	$5.8\left(7.8\right)$	$[-21.1,15.0]$	$9.7$	$0.98$	$\pm 5.33\left(0.0\right)$
SW (cm)	$9.9\left(9.2\right)$	$10.2\left(10.1\right)$	$-0.4\left(4.4\right)$	$1.5\left(4.2\right)$	$[-9.0,8.3]$	$4.4$	$0.93$	$\pm 0.51\left(0.0\right)$
MTC (cm)	$1.7\left(1.0\right)$	$1.9\left(0.7\right)$	$-0.2\left(0.8\right)$	$0.6\left(0.6\right)$	$[-1.9,1.4]$	$0.9$	$0.55$	$\pm 0.10\left(1.0\right)$
Turn angle (${}^{\circ }$)	$37.3\left(41.0\right)$	$36.4\left(41.0\right)$	$0.9\left(8.6\right)$	$2.3\left(8.4\right)$	$[-16.0,17.8]$	$8.7$	$0.97$	$\pm 1.82\left(0.0\right)$